codecentric.de

Checked 21 October 2026, 22:10 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 warnings 0 failed 3 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

info

ns-1404.awsdns-47.org, ns-1888.awsdns-44.co.uk, ns-267.awsdns-33.com, ns-770.awsdns-32.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-1404.awsdns-47.org, ns-1888.awsdns-44.co.uk, ns-267.awsdns-33.com, ns-770.awsdns-32.net
NS in the zone
ns-1404.awsdns-47.org, ns-1888.awsdns-44.co.uk, ns-267.awsdns-33.com, ns-770.awsdns-32.net
NameserverAddressesNetwork (AS)Glue
ns-1404.awsdns-47.org205.251.197.124 2600:9000:5305:7c00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-1888.awsdns-44.co.uk205.251.199.96 2600:9000:5307:6000::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-267.awsdns-33.com205.251.193.11 2600:9000:5301:b00::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-
ns-770.awsdns-32.net205.251.195.2 2600:9000:5303:200::1AS16509 AMAZON-02 - Amazon.com, Inc., US AS16509 AMAZON-02 - Amazon.com, Inc., US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns-1404.awsdns-47.org, ns-1888.awsdns-44.co.uk, ns-267.awsdns-33.com, ns-770.awsdns-32.net.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 4 IPv4 /24s and 4 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16509 (AMAZON-02 - Amazon.com, Inc., US): 8 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .net, .org, .uk.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

pass

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-1404.awsdns-47.org 205.251.197.124NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-1404.awsdns-47.org 2600:9000:5305:7c00::1NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns-1888.awsdns-44.co.uk 205.251.199.96NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-1888.awsdns-44.co.uk 2600:9000:5307:6000::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-267.awsdns-33.com 205.251.193.11NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-267.awsdns-33.com 2600:9000:5301:b00::1NOERROR, 9 ms, authoritativenoyes / yesrefused-
ns-770.awsdns-32.net 205.251.195.2NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns-770.awsdns-32.net 2600:9000:5303:200::1NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 8 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 1 · primary ns-267.awsdns-33.com

Found

Primary (MNAME)
ns-267.awsdns-33.com
Contact (RNAME)
awsdns-hostmaster.amazon.com
Serial
1
Refresh / retry
7200 s / 900 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns-1404.awsdns-47.org (205.251.197.124)1
ns-1404.awsdns-47.org (2600:9000:5305:7c00::1)1
ns-1888.awsdns-44.co.uk (205.251.199.96)1
ns-1888.awsdns-44.co.uk (2600:9000:5307:6000::1)1
ns-267.awsdns-33.com (205.251.193.11)1
ns-267.awsdns-33.com (2600:9000:5301:b00::1)1
ns-770.awsdns-32.net (205.251.195.2)1
ns-770.awsdns-32.net (2600:9000:5303:200::1)1

Checks

  • ✓ Serial 1 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 15m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-267.awsdns-33.com is one of the listed nameservers.
  • ✓ Contact awsdns-hostmaster@amazon.com #25
    The SOA RNAME awsdns-hostmaster.amazon.com means awsdns-hostmaster@amazon.com.
  • ✓ Counter serial #26
    The serial 1 is a plain counter.

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

warn

37 records at the apex

Found

Read from
205.251.197.124:53
TypeValueTTL
SOAns-267.awsdns-33.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400900
NSns-1404.awsdns-47.org.172800
NSns-1888.awsdns-44.co.uk.172800
NSns-267.awsdns-33.com.172800
NSns-770.awsdns-32.net.172800
A63.177.169.1660
A52.58.50.23060
A3.66.245.23860
MX1 aspmx.l.google.com.3600
MX10 aspmx2.googlemail.com.3600
MX10 aspmx3.googlemail.com.3600
MX5 alt1.aspmx.l.google.com.3600
MX5 alt2.aspmx.l.google.com.3600
TXT"0ed1fe018a5f1f487e65664922a7ce4d7878f79d86"300
TXT"MS=ms13174703"300
TXT"TAILSCALE-b30ivmAfkNw4FzPIvdBU"300
TXT"ZOOM_verify_-JDnFN1QQQiKbyImyvea-Q"300
TXT"apple-domain-verification=OJRIKhDGtxZIPuGg"300
TXT"atlassian-domain-verification=yI1QO91d7/2fxTPWuBWwMZa/W75XxlIZrsfOnczO5t12v5v4MIDWEyKia9RU/qW3"300
TXT"google-site-verification=4DIP87gPngYjYhY5tgw8-6tMLqTVTs9xR_EiS0G66_Y"300
TXT"google-site-verification=5riUn0sQdCV0mM7H-EMzbPoNIC0a4OuyCGWgB9voiuA"300
TXT"google-site-verification=E7EWuKZJnZgoab6SfzHkrwz4z5BkNv3_TNElp9rVbpY"300
TXT"google-site-verification=IzaYwjn4ZF3_b6b3yvda8Yf2lbxVLAldWv4p5ozuwrU"300
TXT"google-site-verification=U4eL4C8jbdRah5SVZLPbE69aTJFTN9QdoOQ5HWzNvyc"300
TXT"google-site-verification=ZQCFemt6Cx1vP2b-YtMCLEbWsnA7tV7uaES7gm1FCxo"300
TXT"jamf-site-verification=2AotGvv8jVXgBG7Whw7d8g"300
TXT"jetbrains-domain-verification=autb7eq1ha0ya7tph61lpreez"300
TXT"mistral-domain-verification=4247f8ff6639820322e787a558ea73bd007741a0"300
TXT"openai-domain-verification=dv-x5F5UZWmqTpO06Igac3RNxXJ"300
TXT"v=spf1 include:_spf.google.com include:amazonses.com include:1918859.spf01.hubspotemail.net ~all"300
CAA0 iodef "mailto:hosting+caa@codecentric.de"300
CAA0 issue "amazon.com"300
CAA0 issue "digicert.com"300
CAA0 issue "letsencrypt.org"300
CAA0 issue "pki.goog"300
CAA0 issuewild "amazon.com"300
CAA0 issuewild "letsencrypt.org"300

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 2d; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: amazon.com, digicert.com, letsencrypt.org, pki.goog.